Device on folding machines



A. STAMPFM 2,020,745

DEVICE ON FOLDING MACHINES Filed OCC. 5, 1955 Patented Nov. 12, 1935 UNITED STATES PATENT OFFICE Application October 3,

1933, Serial No. 691,971

In Switzerland July 13, 1933 2 Claims.

This invention relates to a device on a known folding machine, which renders it possible to paste a reinforcing tape between the parts of the folded seam in a single operation with the folding 5 of the seam. I

An embodiment of the invention is illustrated by Way of example in the accompanying drawing in which Fig. 1 shows in perspective the device on a folding machine,

Fig. 2 shows the guide bar in front elevation,

Fig. 3 is a front elevation of the folding foot of the folding machine with the tape feeding eye,

Fig. 4 is a side .elevation of Fig. 3,

Fig. 5 shows the paste holder in vertical section,

Fig. 6 shows a portion of a folded seam with reinforcing tape stuck between the parts,

Fig. 7 is a cross section through the seam shown in Fig. 6.

A flat lever 4, bent at right angles and carrying a guide eye 3, is pivotally mounted on a folding foot I of a folding machine 2 reciprocatable in known manner. The lever 4 is provided with a projection 5, which engages in a corresponding 25 notch 6 in the foot I so that the lever is arrested in operative and inoperative position. A guide bar 9 provided with eyes 8 is fixed by means of screws on the machine head 'I above the folding foot and serves for guiding the reinforcing tape. A stand I is mounted ony the machine table T. An upper carrier I I, adjustable in height on this stand, carries a guide pulley I2. The reinforcing tape I is wound on a rotary drum I4 on a lower carrier I3 adjustable on the stand I il. A paste container I6 is arranged under the table T and has in its cover two narrow apertures I1 and I8 for guiding into and out of the container the reinforcing tape I5 to be steeped in paste. Two strippers I9 made of felt are fixed on the inner side of the cover adjacent the outlet aperture I8 and remove any excess paste from the tape. A bracket ZI on the inner side of the container cover dips into the paste 20 and carries on its lower end a guide pulley 22.

With the aid of the device described the reinforcing tape I5 is placed between the parts 23 and 24- of the seam whilst this seam is being folded on the folding machine. Merely the seam is folded over in known manner by the folding machine. During the folding of the seam, the reinforcing tape I5, as shown in Fig. 3, is fed between the parts 23 and 24 by means of the guide eye 3. During this Ioperation the tape I5 5 unvvinds from the drum I 4, passes through the paste container I6, travels over the guide pulley I2 and is introduced into the continually forming seam 23, 24 by means of the guide bar 9 and guide eye 3 and united by the paste toform 10 a resistant seam as shown in Fig. 7. The tape I5 may be of such Width, that it lies entirely within the seam formed by the part 24. The device according to the invention permits the folding of leather pieces having irregular, for example curved edges.

I claim:-

1. A device on a folding machine, comprising in combination with the machine table and machine head and the folding foot, a stand on said table, a carrier on said stand, a roll mounted on said carrier and adapted to receive a supply of reinforcing tape, a paste container below said table adapted to coat with paste the tape running from said carrier, a pulley mounted on said stand 25 adapted to guide the pasted tape leaving said container, a guide bar mounted on said machine head adapted to guide said tape from said pulley to said foot, and a lever mounted on said foot and having an eye, adapted to feed the tape between the folds of the seam Whilst this is being formed.

2. A device on a folding machine, comprising in combination with the machine table and machine head and the folding foot, a stand on said table, a carrier on said stand, a roll adjustably mounted in height on said carrier and adapted to receive a supply of reinforcing tape, a paste container below said table adapted to coat with paste the tape running from said carrier, a pulley adjustably mounted in height on said stand adapted to guide the pasted tape leaving said container, a guide bar mounted on said machine head adapted to guide said tape from said pulley to said foot, and a lever mounted on said foot and having an eye, 45 adapted to feed the tape between the folds of the seam Whilst this is being formed.

ADOLF STAMPFLI. 

